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Defoe, who has struggled for playing time this season after making four substitute appearances in the league, will remain at Rangers until 2020 but Bournemouth have the option of recalling the 36-year-old in July.

"I'm delighted to be able to welcome Jermain to Rangers," Gerrard told the Rangers website. "He is an exceptionally talented striker and vastly experienced footballer who has scored goals at every club he has played for.

"He'll be a great addition to our dressing room and we look forward to integrating him into the squad whilst we work in Tenerife over the next week."

Former West Ham United, Tottenham Hotspur and Sunderland striker Defoe has made 34 appearances in his second spell at Bournemouth, scoring four goals.

He has scored 162 Premier League goals in 496 appearances throughout his 24-year professional career and has 57 caps for the national team to date.